Drag line bucket



A -25 1931. THOMPSON 1,820,114

' DRAG LINE BUCKET Filed June 26. 1928 /INVENTOR.

/@ fi I ATTORNEYS.

Pam-ta; Aug. 25, 193i UNITED STATES PATE T] OFFICE? if :enonen THOMPSON,01 ERIE, rnnnssrnvnnis, ASSIGNOR To a. H. WILLIAMS COMPANY, or ERIE,rimnsiztvnman CORPORATION PENNSYLVANIA DRAG LINE BUCKET Applicationfiled June 26,1928. Serial No. 288,360.

Drag line buckets have ordinarily been formed of sheet plate. It isdesirable to have the center of gravity comparatively low in the bucket.It is also necessary, or desirable, that the side walls of the bucket besuf- 5 liciently braced to prevent collapsing under the strain of thepulling bail chains and that the bucket as a whole as compared to itsstrength he comparatively light. The in- 10 vention is directed totheimprovement of the bucket along these lines. Features and details of theinvention will appear from the specification and claims.

A preferred embodiment of the invention is illustrated in theaccompanying drawings as follows Fig. 1 shows a side elevation of thebucket.

Fig. 2 a section on the line 2-2 in Fig. 1.

Fig. 3 asection on the lines 3 -3 in Figs. l and 4. V

F1 l a'section on the line 14: 1n Fi 1. m b

Fig. 5 a section on the line 55 in Fig. 1. The bucket walls are formedof a sheet metal plate forming the bottom 1 and side 5 walls 2 bent upfrom the bottom. A flanged end plate 3 is secured within the rear edgesof the side plates and bottom plate. The side'plates are braced byre-enforcing plates 4. These extend from the front of the bucket to theshackle plates 5 to which dump chains 6 are secured. A lip plate 7,preferablygof .caststeel, is secured under the bottom 1 and extends upalong the sides and forward of the lip. The lip plate has the cuttingedge 8. A shoulder 9 receives the front edge of the bottom plate 1.-Teeth 10 are secured over the lip plate and have the rearwardlyextending shanks 11 which are secured to the lip plate and bottom plateand at the rear are secured to skid plates, or bars 12 which extendforwardly to the rear edge of the lip plate 7 and are arranged under therear of the shanks 11 and extend up the rear of the bucket bracing therear. The lip plate is notched onits inner face at 13 to' receive there-enforcing plate 4. Hitch plates 14 are arranged outside there-enf0rcing plate 4 and in advance of the forwardly extending portionof the lip plate. A bridge 15 extends over the front part of the bucket.This'is formed of a single casting. It has thetran sverse ribs 16extending from side to side of he bucket and these are joined by1ong'itudi nal ribs 17 connecting the ribs 16. The sides of the bridgeextend, downwardly within the side walls 2, the side Walls having theupper edges at the front extending over the bridge piece a 2a andsecured theretobyrivets 18. The lower ed 'e of the bridge overlaps thelip plate 7 and the hitch plate 14,

A patch plate 19 extends over and overlaps the lip plate and thehitchplate'and is socured, by rivets which extend through the patch plate,the lipplate, the re-enforcing plate, the hitch plate, and the bridge,thus" tying all these plates-together. A ribbed j cheek pl ate-20issecured over the; patch plate this ribbedcheek plate having anintegral rib 21, the purposeof whichisto stiffen the sides p carryingthe bridging efl ect ofthe lip'plate forward to the hitch plate.

Pull bail. chains 22 extend from the hitch v plate to a pull bail socketfitting 23 to which a cable 23a is attached and a cabl'eQ i extendsfromthe fitting 23 over a sheave 25 tojthe bridge, being secured to thebrie ge by a titting 25a. A sheave block 26 is connected by apin 26a toa hoist fitting 27, the chai n 6 also'bei'ng connected to the pin 26a.

With this structure, the bridge being formed of a steel casting andparticularly ribbed as it is within makes it possible to form thisbridge with greater stiffness and with less weight than with a built-upfabric.

By overlapping the bridge with the different plates at the sides of thebucket it is tied in with these parts and strengthens them. By utilizinga cast lip plate it can benotched to a receive the re-enforcing platesandv by rib-- hing the sides of the bucket the rigidity of the lip platemay be carried forward toward the hitch plate.

What I claim as new is 1. A dragline bucket comprising a body 1 and sidewalls of sheet metal, a bridge joining the side walls formed of castmetal, said bridge being ribbed and extending down the inside of theside walls; a lip plateextending along the bottom and up the sidesoverlapping the bridge; and rivets extending through the bridge, sideand lip plate.

2. A drag line bucket comprising a body and side Walls of sheet metal, abridge joining the side Walls formed of cast metal, said bridge beingribbed and extending down the inside of the side walls, a re-enforcingplate on each side wall, a lip plate of cast metal having a notch. ateach side receiving the reenforcing late, said lip plate and bridgeplate over apping, and rivets extending through the lip plate,re-enforcing plate, side wall and bridge at each side of the bucket.

3. A drag line bucket comprising a body and side walls of sheet metal, abridge joining the side walls formed of cast metal, said bridge beingribbed and extending down the inside of the side Walls, a lip plateextending along the bottom and up the sides overlapping the bridge, ahitch plate at each side of the bucket in advance of the lip plate, apatch plate outside and overlapping the lip plate. and hitch plate ateach side of the buckat, and rivets extending through the patch plate,lip and hitch plates, side and. bridge at each side of the bucket.

4. A drag line bucket comprising a body and side Walls of sheet metal, abridge joining the side Walls formed of cast metal, said bridge beingribbed and extending down the inside of the side walls, a. lip plateextending along the bottom and up the sides overlapping the bridge, ahitch plate at eachside of the bucket in advance of the lip plate, apatch plate outside and overlapping the lip plate and hitch plate ateach side of the bucket, rivets extending through the patch plate, lipand hitch plates, side and bridge, and a ribbed cheek plate extendingalong each patch plate and overlapping each hitch plate and lip plate.

In testimony whereof I have hereunto set my hand.

GEORGE F. THOMPSON.

